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Hurricane warnings have been issued from east of Morgan City, La., to Destin, Fla., including the greater New Orleans area.

The National Hurricane Center said Isaac is expected to make a turn northwest within the next 24 hours. The storm is moving at 14 mph and is expected to decrease in speed.

Forecasters said the tropical storm will move over the eastern Gulf of Mexico on Monday and approach the Gulf Coast in the hurricane warning area on Tuesday.

Isaac’s top sustained winds are 65 mph, but the storm is expected to become a hurricane by the time it makes landfall. Tropical-storm-force winds are extending outward up to 240 miles from the center of the storm.

The National Hurricane Center predicts Isaac will grow to a Category 1 hurricane over the warm water of the Gulf and possibly hit late Tuesday somewhere along a roughly 300-mile stretch from the bayous southwest of New Orleans to the Florida Panhandle.

That would be one day shy of seven years after Katrina struck in 2005, although Katrina was a much stronger, Category 5 storm.